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通过某两端开口的三心圆柱面网壳结构刚性模型风洞测压试验,分析了该结构表面净压分布规律及内表面风压对净压的影响。结果表明,来流垂直与结构纵向时,结构迎风端为正压区,其余为负压区,顶部附近负压最强,内压为负压,该负压增强了结构正压区风压、减弱负压区的风压。当来流平行于结构纵向时,除结构迎风端较强风压外,其余位置平均风压和脉动风压很小,内压对结构表面风压的影响可以忽略。来流倾斜与结构纵向时,结构内表面存在正压区,该区域内结构负压较大。
The net pressure distribution of the structure and the effect of the inner surface wind pressure on the net pressure were analyzed by the wind tunnel pressure test of the rigid-core model of the triple-cone cylindrical reticulated shell with open ends. The results show that when the incoming flow is vertical and the longitudinal direction of the structure, the windward side of the structure is positive pressure zone and the rest is the negative pressure zone. The negative pressure near the top is the strongest and the internal pressure is negative. The negative pressure enhances the wind pressure in the positive pressure zone, Reduce the pressure of the negative pressure zone. When the incoming flow is parallel to the longitudinal direction of the structure, the average wind pressure and fluctuating wind pressure at the remaining positions are very small, except for the strong wind pressure at the windward side of the structure. The effect of internal pressure on the surface wind pressure can be neglected. When the flow is inclined and the longitudinal direction of the structure, there is a positive pressure area on the inner surface of the structure, and the negative pressure of the structure in this area is larger.